Improvement in saw-filing instrument



encuen-n. NoRRIs,` or. cLENs rALLs'Nn'W YORK.

A11mm Para: No. 103,075, lated May 17, 1870.

IMPROVEMENT N SAW-FILING- INSTRUMENT.

` The Schedule referred to in these Letters Patent and making part o! the same.

To all whom it nuly concefr`n.

ABe it known that I, GEORGE E. N onms, of Glens Falls,'in thecounty of Warren and State `of` New Yer-k, have invented a new and useful Improvementl in Saw-Filing Instrument; andnI do hereby declare that the. following is a full, clear, and exact descrip-Y tion `thereof, which will enable others skilled in the art to malte and use the same,'reference being had tol the accompanying drawings forming a part-ot'tliis specification, ju which-f n Figure lis a side view of my improved instrument.

i i .Figure 2 is a vertical section 'of the sanie, taken `through the linea En, fig. 1.

Figure 3 is a s'ideview; ofthe gauge. .Similar letters of reference indicate. corresponding parts. 'Y

-My invention has for its `object to furnish a simplev and convenient instrument, by means of' which a'saw may be filed conveniently and accurately, at any desired pitch and bevel, and which willinsurev all the teeth heingled exactly alike', and 1 It consists in. the construction and combination ot' the various parts of `the instrument, as' hereinafter' more fully described. 4

"A is the frame of the instrument, which is slotted. rertically, from its lower side, to receive. the saw, and -rests upon the teeth'ot' the saw, as shown -in Iig. 1.

In vertical grooves in the side of theframeA are placed arrnsor bars, B, which are adjustably secured to said Iframe by set-screws b', whichpass through slots in the said arms or bars, and screw into the said frame C is the head, the -base or lower part of which is made circular, andvfrom the opposite sides of its up ,j per edge-rise two angular` projections, c1, as shownin figs.` 1 and 2. The head G is slotted vertically from its lower side, to correspond with the slot of thezframe A, said slot passing up through -the angular projections c, ncarlyto their angles,'as shown iu iig. f?.V v The lower part of the head, at right angles with 4the angular projections cl, is recessed to receive the rounded upper ends of thefa'rnis or. bars B, to which ends the said head O is secured by screws-c.

By this construction thehead C may be inclined, to give the required pitch to the saw-teeth, and, when adjustable, may be securely clamped to the-side' arms or bars B. The adjnstmentgof the bars B enables the head (l to b eraised and lowered according as the saw Vto be filed may have more .or `less teeth to an inch. y

V Y l u n D is thegauge, which 1s made cylindrical 1n its ,general forni, and the npper'part of' which is notched,

as shown in fig. 1, said notch being made of exactly the same angleas the le to be used. The gauge D is slotted to receive thesaw, said slot being so formed, as shown in figs. 1 and 3, that .the gauge D maybe partially rotated in its seat in the head '0, to give tlie desired bevel to the saw-teeth.

The gaugeDis secured in place, when adjusted, by

'the set-screw d', which passes in through the side of a groove -in the side of theY the head G, and enters said Vgauge D.

E is an angular gauge, vpivoted at its end to the free cull of the arm E, the other end of which is pivoted to the upper end ot' the arm G, the lower end of' which is adjust-ably secured to the frame A by a screw, g'. The gauge E is designed to enter the notches between the saw-teeth, and insure the teeth being in-proper position in the gauge VD to be operated upon.

The gauge E is held dow upon the saw-teotlrby the coiled spring H,'the upper end ot'which is at ytached to the free endof the arm F, and its lower end is attached to the lower enl of the arm G, as shown `in g. 1'.

In using the instrument the file should every time be used till it goes down to the bottom of -t-he notch in the gauge D, which gauge should be case-hardened,

so that the ile will ,not act uponfrit.

. Having thus described my invention,

What I claim as new, and'desire to secure by Let` ters Paten-t, 'isl 1. The'frameA, slotted arms B, adjustable head C el, and adjustable case-hardened gauge D, in coinbinatiou with each other, said parts being constructed and operating substantially as herein shown and den scribed, and for the purposes set forth, y.

2. rllhe combination of the frame A, adjustable arms B, adjustable head G cl, adjustable case-hardened gauge D, gauge E, pivoted arm F, adjustable 'arm G, vand spring H with each other, said parts be lng constructed and operating substantially as'here'in Ashown and described, and for the purposes set forth.

GEORGE E. N ORRIS.

Witnesses:

WILLIAM HorcHKiss, S. L. GOODMAN. 

